
<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
  <style type="text/css">
    body, html{width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}
    #allmap {width: 100%; height:500px; overflow: hidden;}
    #result {width:100%;font-size:12px;}
    dl,dt,dd,ul,li{
      margin:0;
      padding:0;
      list-style:none;
    }
    p{font-size:12px;}
    dt{
      font-size:14px;
      font-family:"微软雅黑";
      font-weight:bold;
      border-bottom:1px dotted #000;
      padding:5px 0 5px 5px;
      margin:5px 0;
    }
    dd{
      padding:5px 0 0 5px;
    }
    li{
      line-height:28px;
    }
  </style>
  <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=E4805d16520de693a3fe707cdc962045"></script>
  <!--加载鼠标绘制工具-->
  <script type="text/javascript" src="http://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.js"></script>
  <link rel="stylesheet" href="http://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.css" />
  <!--加载检索信息窗口-->
  <script type="text/javascript" src="http://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.js"></script>
  <link rel="stylesheet" href="http://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.css" />
  <title>鼠标绘制工具</title>
</head>
<body>
<div id="allmap" style="overflow:hidden;zoom:1;position:relative;">
  <div id="map" style="height:100%;-webkit-transition: all 0.5s ease-in-out;transition: all 0.5s ease-in-out;"></div>
</div>
<div id="result">
  <input type="button" value="获取绘制的覆盖物个数" onclick="alert(overlays.length)"/>
  <input type="button" value="清除所有覆盖物" onclick="clearAll()"/>
</div>
<script type="text/javascript">
  // 百度地图API功能
  var map = new BMap.Map('allmap');
  var poi = new BMap.Point(116.307852,40.057031);
  map.centerAndZoom(poi, 16);
  map.enableScrollWheelZoom();
  var overlays = [];
  var overlaycomplete = function(e){

    overlays.push(e.overlay);

    var path = e.overlay.getPath();//Array<Point> 返回多边型的点数组
    for(var i=0;i<path.length;i++){
      console.log("lng:"+path[i].lng+"\n lat:"+path[i].lat);
    }
  };
  var styleOptions = {
    strokeColor:"red",    //边线颜色。
    fillColor:"red",      //填充颜色。当参数为空时，圆形将没有填充效果。
    strokeWeight: 3,       //边线的宽度，以像素为单位。
    strokeOpacity: 0.8,	   //边线透明度，取值范围0 - 1。
    fillOpacity: 0.6,      //填充的透明度，取值范围0 - 1。
    strokeStyle: 'solid',//边线的样式，solid或dashed。
    enableEditing:true
  }
  //实例化鼠标绘制工具
  var drawingManager = new BMapLib.DrawingManager(map, {
    isOpen: false, //是否开启绘制模式
    enableDrawingTool: true, //是否显示工具栏
    drawingToolOptions: {
      anchor: BMAP_ANCHOR_TOP_RIGHT, //位置
      offset: new BMap.Size(5, 5), //偏离值
    },
    circleOptions: styleOptions, //圆的样式
    polylineOptions: styleOptions, //线的样式
    polygonOptions: styleOptions, //多边形的样式
    rectangleOptions: styleOptions //矩形的样式
  });
  //添加鼠标绘制工具监听事件，用于获取绘制结果
  drawingManager.addEventListener('overlaycomplete', overlaycomplete);
  function clearAll() {
    for(var i = 0; i < overlays.length; i++){
      map.removeOverlay(overlays[i]);
    }
    overlays.length = 0
  }
</script>
</body>
</html>
